Syringe



Oct. 28, 1947 c. J. CROWLEY SYRINGE Filed Jan. 22, 1945 2 She et5Sheet l Oct.- 28, 1947. C. J. CROWLEY SYRINGE Filed Jan.,22, 1945 2 Sheets-Sheet 2 Patented Oct. 28, 1947 UNITED STATES PATENT OFFICE Cornelius J. Crowley. New Haven, Conn, assignor to The. Seamless Rubber Gompany, New Haven, Conn, .a. corporation of Connecticut.

Application January 22, 1945, Serial N 0. 573,983-

2 Claims. 1

This invention relates to syringes, and more particularlyto fountain syringes thatare intended to be storable in a small space so that they may be easily packed in a week-end bag, handbag, or the like.

One of the objects of the invention is to prov-idea syringe bag of plastic material which is set or vulcanized in a shapeor' form in which the bag is partially folded, and which shape or form is such as to lend itself readily to further folding so that the bag, considering its holding capacity, can be packed in a very small space Another object is to provide a bag of rubber or similar material which can be readily handled and manipulated, and which has relatively large capacity.

In the accompanying; drawings: l is a front elevation of a syringe bag embodying my improvements, showing 'as it is ready to be supported against a suitable wall or the like;

Fig. 2 is an edge view of the bag;

Fig. 3 is a view similar to Fig. showing the bag as it appears when holding a body of liquid;

Fig. 4 is a top view of the bag as illustrated in Fig. l, on a somewhat larger scale;

Fig. 5 is an enlarged section on line 5-5 of Fig. 1;

Fig. 6 is an enlarged section on line 8-6 of Fig. 1.;

Fig. 7' is a fragmentary view of the upper end portion of the bag in the-process of manufacture;

Fig. 8 is a. section on line 8-8 of Fig. '7;

Fig. 8 is a further section showing the process of manufacture;

Fig. 9 is a detail showing the blank of a neck member used at the upper end of the bag; and

Fig. 10 is 'a section on line Ill-40 of Fig. 3.

In the article selected for illustration in the drawings, the syringe bag or water bag, which is made of vulcanized rubber or rubberlike elastic material which has been cured by heat, is in the form of a shallow, relatively fiat body having at the upper end a filler neck of suitable capacity, whereas at the lower end oi the bag there is a nipple for connection to the.=usual flexible syringe tube. The bag when wholly or partially filled with liquid has wall portions which are extended to a substantial degree laterally beyond the filler neck. .Also preferably the body of the bag has under .these conditions rounded corner portions at the of a tap ed. h s p t en ha in marsa n a upwardly :and outwardly to rounded corners rat the lower part of the bag body, but variation may be. made. in. this respect. and in others. A very advantageous feature of the structure shown arises from the. fact. that the bag body is vulcanized or set: with the bag in a folded condition such that it lends itself readily to further folding. The set of the bag, produced by vulcanizing or othertreatment is such that, in the normal :state, that is, when, not. filled with liquid, the sides of the. bag extend in line with the sides of the neck so as to provide a bag body the principal portion of which issubstazntially rectangular and. elongated in a vertical direction so as to facilitate folding of the bag by making horizontal folds therein, a fold or folds being made at one or more places at any one or more points in the lengthof the bag as may be desired. In this condition the bag has at the lateral edges. thereof re-entrant portions or .folds lying in planes between the front and, rear walls, these folds being in the nature of flat pleats or accordion pleats. When, however, the bag is filled the pleated portions are forced outwardly :so that the pleats disappear and the bag. then somewhat resembles in outward. appearance a water bag or syringe bag such as commonly used, although when its liquid 'isxdischarged it will resume, its initial shape, the portions which form the rounded corners at the upper and lower errds of the bag being con- Verted again intov .re-entrant pleat portions.

-11: the drawings, the body of the bag is indicated generally at 15 and the filler neck generally at '16. Associated with the filler neck is a tab. llwhich may lie against the. supporting wall, and this tab is. provided with aperfo-ration 18' by means of which the bag; can be suspended from .a hook or nail. At the lower end of the bag is a nipple l9 extending through the bag wall and serving for the attachment. of the usual flexible syringe tube 211.

Asiwillvbe seen from Fig. 1, the bag'when empty is of elongated shape having a body which is for the most part substantially rectangular and relatively narrow, this body being of the same width as the neck portion It (Big. 1.) and including said neck portion as a part thereof. At the lower end of the bag the rectangular body just described has 'a reduced or tapering downward extension 122i that ends at the outlet in which the. nipple i9 is placed. At the sides .of the rectangular body are the re-en-trant pleat portions 22-, as shown particularly in Fig. 6, each :of said portions having .as parts thereof opposite parallel, walls 23., 24 integral with the flexible elastic front and rear walls 25, 26 with which the bag is provided. At the inner edges of the pleats 22, where the walls 23 and 24 are integrally joined, there is an inward extension 21 in the form of a flange. The free edges of the pleats are curved at their upper and lower parts but substantially straight in the middle, as indicated by the dotted lines in Fig. 1.

Notwithstanding the provision of the pleats 22, the bag is shallow and flat. In the drawings,

the thickness of the bag is somewhat exagger-- ated, this being especially true in respect-to Figs. and 6, where for illustrative purposes certain dimensions are increased.

It will be noted that the filler neck [5 of the bag is characterized by an enclosing wall 2'8 which is of greater thickness than the walls of the main bag portion, as appears in Fig. 5. The filler neck is a shallow relatively wide neck providing for easy filling of the bag, and the wall portion 28 extends throughout the perimeter of the neck, and at the rear the wall is continued in substantially the same thickness to form the tab portion IT. The tab portion has a reinforcing rim 29 at the edge which is integral with a rim or bead 30 provided along the front edge of the filler neck.

' It will be noted that in the form shown the lower portion 2| of the bag (Fig. 1) has concave edge portions Zi These join convex edge portions 2| in a manner to provide reverse or ogee curves. The curved portions 2 I are at the lower corners of the bag, and the curved upper corners are indicated at 2 l.

It will be noted from Fig. 5 that, in the locations where the thinner walls join the relatively thick wall of the neck, the neck presents an interior shoulder 3|, and that the filler opening 32 within the neck is of somewhat smaller dimensions than the adjacent part of the bag body. This structure in the completed article may be provided, for example, by a process of manufacture in which a rubber blank 33, such as shown in Fig. 9, is applied externally to the upper portion of an uncured rubber bag body and vulcanized thereto, the article thereafter being turned inside out. The blank 33 consists of a strip 34 having an integral tab portion 35. This blank 'is placed around the mouth of the uncured body blank 36 in the manner shown in Figs. 7, 8 and 8 and the ends 31 of blank 33 brought together so that they meet. In the process of vulcanizing, the walls of the neck blank and bag body are flowed together to provide an integral structure. The preferred practice is to provide the bag wall 26 with an upward extension 26 which, in the process of making the .article, overlies a face of the tab portion 35 in the manner shown in Fig. 8 and is subsequently flowed into said tab portion.

The flanges 2'! preferably extend throughout the entire length of the pleated portions and are of great value in giving a relatively thin-walled bag the requisite strength and providing against leakage along the free edge portions of the pleats, at which portions the opposite wall parts may advantageously be flowed together, if desired, in the process of manufacture. In any event the flanges 2'! are of great value in reinforcing the bag body against strains tending to burst the bag. These flanges are at the apices of the pleats, and run along the curved upper and lower edge portions of the pleats, where the latter are joined respectively to the neck portion and to .the lower extension. The extension 2| is like- 4 wise provided with similar reinforcing flanges along the edges, these flanges being inwardly disposed, as indicated at 38 in Fig. 1. It is understood, therefore, that, when the bag is in the condition shown in Fig. 1, an inwardly extending flange 2! on a pleat has to a slight extent an overlapping relation to the adjacent flange 38, but that when the bag is expanded these flanges 2"! and 38 merge into each other without showing their junction. As shown in Fig. 1, the pleated portions extend into close proximity to the longitudinal median line of the bag. The base portions of the pleats are substantially parallel to the longitudinal median line of the bag substantially throughout their length.

The blank 33 has a rib or bead 33 along its upper edge, as shown in Fig. 9. The bag body blank has a bead 30*, as shown in Fig. 8 In the vulcanizing step bead 3i] is flowed into a part of bead 33 By the invention there is provided a syringe bag which can be very readily handled and can be stored in a very small space. In its normal condition the bag is partially folded, the same being of elongated form and with substantially straight sides so as to take up little space and be in a convenient form for handling and manipulation. When in this normal flattened-out condition, as shown in Figs. 1 and 2, the bag can be further folded in many different ways, as may be desired, along one or more transverse folds. or it may be rolled up if desired. Notwithstanding these features, however, the bag has large capacity. After discharging the liquid from it, the bag restores itself from a distended shape to a folded shape, but will be expanded again when liquid is introduced.

While only one form of the article is shown in the drawings, it will be understood that the invention can be embodied in many different forms without departure from the principles of the invention or the scope of the claims.

What I claim is:

1. A syringe bag of cured plastic material adapted to be folded or rolled up So as to be packed in a small space and characterized by a relatively wide but shallow neck, and a body attached to the neck and which when the bag is empty has its sides in line with the sides of the neck, the side marginal portions of the body being cured to stand in as re-entrant folds having their attached or base portions in line with the sides of the neck, the bag body being provided at the end opposite the filler neck with a portion extending longitudinally beyond the side folds and carrying tube-attaching means, the side edges of the last-named portion being curved and the side folds being curved at the upper and lower parts of their free edges whereby the bag when expanded presents a body with rounded corners extending laterally from the neck and adjacent the other end marginal portions curved along reverse or ogee curves, the marginal portions of the side folds and of the extended tube-attached part of the bag having projecting flanges, the flanges of the side folds extending in an inward direction when the foldsstand inwardly and also when they stand outwardly.

2. A syringe bag of cured plastic material, having a neck portion and a body with marginal portions adapted to extend laterally beyond the neck when the bag is filled, the bag having at the lower part a portion of reduced width carrying a tube nipple, the side marginal portions of the bag being cured to stand in normally as re-entrant folds 5 having their attached or base portions disposed substantially in line with the sides of the neck, said side marginal portions having free edges with projecting flanges, the flanges of the side folds extending in an inward direction when the folds stand inwardly and also when they stand outwardly.

CORNELIUS J. CROWLEY.

REFERENCES CITED The following references are of record in the file of this patent:

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